什么是应急预案?编制灭火应急疏散预案的目的是什么?
下列试验中,可用于检测生殖细胞染色体损伤的试验是()。 ["小鼠骨髓多染红细胞微核试验","小鼠骨髓染色体畸变试验","显性致死试验","果蝇伴性隐性致死突变试验","哺乳动物细胞正向突变试验"]
风寒束肺之咳嗽的治疗选方为(). ["桑杏汤","桑菊饮","桂枝汤","桑白皮汤","杏苏散"]
外感咳嗽的治疗原则为(). ["宣肺散邪","健脾燥湿","化痰止咳","清热润燥","敛肺上咳"]
Ames试验在致癌物筛检时,可检出()。 ["使染色体损伤的致癌物","使染色体数目改变的致癌物","有基因诱变作用的致癌物","无基因诱变作用的致癌物","引起染色体不分离的致癌物"]
疏散楼梯的净宽度检查的要求有哪些?